Is there a way to see the sales order a project created from using the Create Projects From Sales Transactions page? I can’t base it on the earliest SO created per project because we have SOs that are created after the project had been created. Thanks in advance.

so what are you trying to do - have a saved search for all or just for one? if for one then it is in related records, and for the search you should select SOs with charges on them

Create a saved search showing the projects created from sales orders using the Create Projects from Sales Transactions page. I can't find a field like "created from" in the project saved search

I do not think you need to have it. The fact you have charges on the SO lines gives you the fact there is a project. Use this instead